View Full Version : "disturbed" image using DMK31AF03
February 3, 2007, 16:42:34
I'm having some trouble with my camera. The issue was there from the start at 15fps, but since I always worked at 30fps I just ignored it.
Now I've switched laptops and I get similar problems at 30fps.
A brief description:
During filming (even just watching the live image) occasionally a frame appears which is "deformed".
Normal Image (http://bartcentral.dommel.be/Normal.gif)
Deformed at 15fps (http://bartcentral.dommel.be/15fps.gif)
Deformed at 30fps (http://bartcentral.dommel.be/30fps.gif)
Now I like a puzzle on occasion, but not while I'm processing moon-movies in registax...
At 15fps about 1 frame in 3 is deformed, at 30fps about 1 frame in 30 (roughly estimated)
The 15fps issue was there on all PC's I've tried (with different FW-controllers), and I've had the occasional deformed image at 30fps on my old laptop, but on the new one, it's so bad the camera essentially becomes useless.
So what my question basically comes down to is... help! how can I fix this?...
February 5, 2007, 09:59:51
This is a know problem, that is caused by the data transfer from FireWire into memory via DMA. Blocks are lost. The problem can be solved, by connecting an USB 2.0 device (like a memory stick or USB 2.0 MP3 Player) to the computer. (Realy, in most cases this helps.)
Please let me know, what type of laptop you use. May be I can find a better solution.
February 5, 2007, 20:13:09
Wow, bizarre advice indeed, but it does work! Thanks very much.
This is a Acer Aspire 1694WLMi
Pentium M 760 Processor (2.0GHz)
512 MB Ram
ATI Radeon Mobility X600
I'm using a Belkin PC-Card with three FW-ports and a plug for 12V
Again, my thanks!
February 10, 2007, 21:09:19
Well, the weather hasn't yet been good enough to get me some new pictures using the "Plug-USB-in" technique, but I did manage to get some pretty nice shots using a Desktop-PC as a temporary workaround:
Overall, I'm pretty happy with the results the DMK camera allows!
February 12, 2007, 11:31:13
I have learned to fix the problem through software and I'll write smal program for that. Then you do not longer need an USB 2.0 device :-) You may send an email to firstname.lastname@example.org to let me remember you automatically!
February 15, 2007, 21:55:04
Hi Stefan and all,
I'm interested too in this software... It will be possible to have a copy?
I've the same problem using Thinkpad T23 with PCMCIA cardbus firewire card and DMK31AF03. Up to now I simply removed "disturbed" frames from avi thinking that my hardware configuration sometimes loss time/frames.
Thanks in advance.
February 16, 2007, 09:30:27
The "FireWire Performance Manager" 1.0 can be downloaded at:
I still work at version 2.0 at this point of time.
February 16, 2007, 18:05:08
Stefan, THANKS so much.
I downloaded it and as soon as possible I'll try it... I hope this week end the weather should be decent.
By the way, I saw on "download/trials" section that ICcapture trial version is dated 15 February... there are some news respect version 126.96.36.1991 that I have?
Thanks for your appreciated reply. ;)
Greetings from Italy to the group.
February 19, 2007, 09:17:27
In IC Catprure 188.8.131.521 are only changes for using the strobe of the our BF cameras.
February 21, 2007, 20:43:28
Stefan, thanks so much for your fast and prompt reply.:)
It is not important, for me, to have new trigger functions... I never used it.
Have a great day and thanks again.
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